Mokwa immediately pulled into a Walmart parking lot and pulled out his phone. He snapped a few pics and a few seconds of video showing the black snake slithering around on his hood.

He said he's not sure if it was a harmless black racer or its more dangerous lookalike. Water moccasins are among Florida's most venomous snakes. Their bites can cause painful swelling and, though it's rare, death. They are often found in or near water.

Mokwa had visited Weeki Wachee State Park over the weekend, and that's when he believes the unwanted passenger climbed aboard. And for all he knows, it's still there.

"Worst part is, I'm not 100 percent sure if it fell off or went back under the hood," he added.